| Lightweight base coating -> Monitor Keywords |
|
|
 
Lightweight base coatingRelated Patent Categories: Synthetic Resins Or Natural Rubbers -- Part Of The Class 520 Series, Involving Inert Gas, Steam, Nitrogen Gas, Or Carbon Dioxide, Processes Of Preparing A Desired Or Intentional Composition Of At Least One Nonreactant Material And At Least One Solid Polymer Or Specified Intermediate Condensation Product, Or Product Thereof, Process Of Forming A Composition Having A Nonreactant Material Selected For Its Special Void Characteristic; Or Composition Containing Same, E.g., Syntactic Foam, Etc.Lightweight base coating description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060178453, Lightweight base coating. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND [0001] Exterior insulation and finish systems (EIFS) are multi-layered exterior wall systems that are used on both commercial buildings and homes. EIFS typically comprises the following components: insulation board made of polystyrene or polyisocyanurate foam, which is secured to the exterior wall surface with a specially formulated adhesive and/or mechanical attachment; a durable water-resistance base coat, which is applied on top of the insulation and reinforced with fiberglass mesh for added strength; an attractive and durable finish coat typically using acrylic co-polymer technology, which is both color-fast and crack-resistant. [0002] The base coat usually contains in addition to the co-polymer, an aggregate that is used to increase the durability and strength of the base coat composition. The base coat is typically supplied in 5-gallon pails that weigh about 60 pounds each. The heavy weight of the pails slows down the productivity of the workers during application of the base coat. [0003] What is needed in the industry is a base coat composition that weighs significantly less than prior art compositions, but retains the properties of a base coat composition. SUMMARY [0004] A lightweight base coat composition is provided which comprises lightweight aggregate, a resin dispersion, and optionally cementitious material. [0005] A method is provided for preparing a lightweight base coat composition which comprises combining lightweight aggregate with a resin dispersion to form a mixture, and combining the mixture with cementitious material to produce a lightweight base coat composition. [0006] A method is provided which comprises providing a lightweight base coat composition prepared by combining lightweight aggregate with a resin dispersion to form a mixture, combining the mixture with cementitious material to produce a lightweight base coat composition, and applying the lightweight base coat composition. BRIEF DESCRIPTION OF THE DRAWINGS [0007] FIG. 1 is a graphical representation of the thickness at which the lightweight base coat composition shows signs of cracking. [0008] FIGS. 2(a) and 2(b) are graphical representations showing the measure of the internal cohesion of the lightweight base coat composition. [0009] FIG. 3 is a graphical representation of the measurement of adhesion in pounds per square inch. [0010] FIG. 4 is a graphical representation of the temperature of the lightweight base coat composition in relation to the measurement of the surface temperature. DETAILED DESCRIPTION [0011] A lightweight base coat composition is provided that comprises a resin dispersion such as acrylic latex/binder, lightweight aggregate and optionally cementitious material to form a lightweight base coat composition. [0012] Multilayered exterior wall systems such as exterior insulation and finish systems (EIFS) are used extensively as the exterior wall surface of commercial and residential buildings. These systems, which include a substrate covered by one or more exterior finishing compositions, provide walls which are insulated and resistant to moisture. The multilayered exterior wall system may be prepared by covering a substrate such as plywood or gypsum board with a layer of insulation board, covering the insulation board with a layer of base coat embedded with a reinforcing mesh, and finishing with a topcoat. [0013] A base coat is generally supplied in 5-gallon pails that weigh about 60 pounds. At the job site about 20 pounds of Base coat is mixed with about 30 pounds of Portland Cement Type I/II. A small amount of water, about 36 ounces, is used to adjust workability. The heavy weight of the pails slows the productivity of the workers during application of the base coat. The lightweight base coat composition provided reduces the weight of a 5-gallon pail by almost 50% from 60 pounds to about 40 pounds and provides improved application characteristics over the same coverage area. The lightweight base coat composition also improves the application characteristics by eliminating sagging and shrinkage. In addition, the lightweight base coat composition also provides increased insulating values. [0014] The reduction in weight is achieved by the replacement of fine sand aggregate with microspheres, which have a density and weight that is less than sands such as silica sand (which is a density less than about 22 pounds per gallon). The lightweight aggregate also provides additional insulation value that reduces the temperature of the substrate below the lightweight base coat composition. The improved insulation value of the lightweight base coat composition allows darker colored finish compositions to be applied over the base coat without the risk of damaging (melting) the expanded polystyrene insulation (EPS) foam board portion of the EIFS system. Reduced weight improves productivity and safety at the job site, and reduces shipping costs. [0015] The lightweight base coat composition retains the appearance and durability characteristics of standard base coats. Further, the light weight base coat composition applies easier, with less effort than a standard base coat. [0016] Resin dispersions may comprise acrylic polymers which are aqueous dispersions of polymers, copolymers, or terpolymers of acrylic acid, acrylic acid ester, methacrylic acid, methacrylic acid ester, styrene acrylic acid, styrene acrylic acid ester, acrylonitrile, non-acrylic polymers such as polyvinyl acetate, styrene butadiene or mixtures thereof. Polymers that may be used can have greater or lesser flexibility depending upon the desired properties of the final finish product. A highly flexible latex will provide, for example, an elastomeric finish. [0017] Lightweight aggregates are aggregate materials that have a density and weight that is less than those of sand, such as silica sand. The lightweight aggregate may be at least one of perlite, vermiculite, fly ash, silica spheres, microballoons, extendospheres, expanded clay, or pumice stone powder, or the like. In certain embodiments, the silica spheres are at least one of glass spheres or ceramic spheres, such as those available from SISCOR, Toronto, Canada. [0018] Hydraulic cement is a material which reacts with water and hardens to produce a water-insoluble material. Examples of hydraulic cement include portland cement, magnesium phosphate cement, magnesium potassium phosphate cement, calcium aluminate cement, calcium sulfoaluminate cement or any other suitable hydraulic binder. [0019] In addition to lightweight aggregate, resin dispersions and hydraulic cement, the lightweight base coat composition can also contain solvents, coalescing agents, thickening agents (rheology modifiers), defoamers, preservatives, flash rust inhibitors, fillers, pigments, or standard aggregates. [0020] A solvent is a liquid and can include odorless mineral spirits and coalescents. Solvents aid in the development and formation of a film by the polymer in the curing process of the coating. They can be used in the manufacture of a coating to dissolve or disperse the film forming constituents. After application the solvent evaporates during drying and therefore does not become part of the dried film. A coalescing agent is a solvent with a high boiling point which, when added to a coating, aids in film formation via temporary plasticization (softening) of the liquid vehicle Coalescing agents may include diethylene-glycol ethyl ether, diethylene glycol ethyl ether acetate, hexylene glycol, and 2-butoxyethanol acetate, and the like. Suppliers of coalescents include Eastman Chemical--Perth Amboy, N.J., Dow Chemical--Midland, Mich. and Union Carbide--Houston, Tex. Continue reading about Lightweight base coating... Full patent description for Lightweight base coating Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Lightweight base coating patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Lightweight base coating or other areas of interest. ### Previous Patent Application: Filler treatments utilizing low voc silanes Next Patent Application: Vinyl ether curing composition Industry Class: Synthetic resins or natural rubbers -- part of the class 520 series ### FreshPatents.com Support Thank you for viewing the Lightweight base coating patent info. IP-related news and info Results in 0.13373 seconds Other interesting Feshpatents.com categories: Software: Finance , AI , Databases , Development , Document , Navigation , Error 174 |
 * Protect your Inventions * US Patent Office filing 
PATENT INFO |
|
